Apparatus for supplying air, steam, or gaseous matter to furnaces.



No. 646,530. Patented Apr. 3, I900. w. a. smmzs.

APPARATUS FOR SUPPLYING AIR, STEAM, 0R GASEOUS MATTER T0 FURNACES.

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No. 646,530. Patented Apr. 3, I900.

' W. G. STONES. APPARATUS FOR SUPPLYING AIR, STEAM, ORGASEOUS MATTER T0 FURNACES.

(Application filed June 18, 1898.)

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W. G. STONES. APPARATUS FOR SUPRLYING AIR, STEAM, ORGASEOUS MATTER T0 FURNACES.

(Application filed. June 18, 1898.)

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UNITED STATES PATENT OFFICE.

IVILLIAM GRIMSHAWSTONES, OF BLACKBURN, ENGLAND.

APPARATUS FOR SUPPLYING AIR, STEAM, 0R GASEOUS MATTER T0 FURNACES.

SPECIFICATION forming part of Letters Patent No. 646,530, dated April 3, 1900.

Application filed June 18, 1898. Serial No. 683,844. (N mod l) T0 at whom it vnay concern:

Be it known that 1, WILLIAM GRIMsHAW STONES, a subject of the Queen of Great Britain and Ireland, residing at Blackburn, in the county of Lancaster, England, haveinvented certain new and useful Improvements'in or Relating to Apparatus for Supplying Air, Steam, or Gaseous Matter to Furnaces, (for which I made application for British patent on the 17th day of November, 1897,) of which the following is a specification.

- My invention relates to means for admitting air, steam, or gaseous matter into steam-boiler and other furnaces for consuming smoke or economizing fuel; and my said invention has for one object to so introduce air into a furnace as to considerably raise its temperature before it is projected onto the live or burning fuel, and thus effect the more perfect combustion of the inflammable gases arising from the fuel instead of such air being admitted and projected, as heretofore, onto the fuel in a cold state.

A further object of my invention is to effect the aforesaid heating of the air in a manner which serves to preserve the life of the apparatus which conveys the air and which in the absence of the cold air passing through it and the protective devices hereinafter described, also its proximity to the burning fuel, is liable to rapidly burn out.

A further object is to allow for the distribution of the air in different directions, according to the condition of the fire.

The accompanying sheets of drawings illustrate the manner in. which the foregoing objects are attained, and the description of the several views is as follows:

Figure 1 represents a longitudinal section of one of the furnaces of a Lancashire boiler with myinvention applied thereto but it will be understood that my invention is equally applicable to the furnaces of other types of boilers or steam-generators which require to be supplied with heated air or gaseous matter. Fig. 2 represents a front elevation of the same furnace. Figs. 3to 9 represent the essential partsof my improved apparatus in detail on a larger scale.

In accordance with my invention I employ a pipe or tube a, having its core divided by longitudinal mid-feather b into two passages 'ous jet of steam into the tube a.

c and d, respectively, as shown more clearly in Figs. 7, 8, and 9. This tube is closed at one end and open at the other end, andthe passages c and 01 only communicate with each other at the closed end of the tube by an open- "ing in the mid-feather or by such mid-feather stopping short of such closed end, as shown in Fig. 9'. The other end of passage, (1 is closed bya plug or block 6. In the outer wall of the passage 01 is a series of holes f(see Figs. 7 and 9) in a row, parallel and radial or otherwise, to suit requirements. This peculiar construction of pipe constitutes a flow and return tube and is fixed, by preference, at one side and near the crown of thefurnace, as shown more clearly in Fig. 2, with the open end at the fire-door end and the closed end at the bridge end. At the closed end it is supported in a refractory (fire-resisting) block g, built into the usual fire-bridge h, and at the open end it is supported in a collar 1', (see Fig. 3,) mounted removably in bracket j on the boiler-front or like part, as shown in Fig. 2.

The extreme front end of the tube is by preference slightly narrower than the other parts and is furnished with a bell or trumpet mouth 76, as shown in Fig. 1. Opposite and projecting into such bell-mouth is a steaminjector nozzle 1, supplied with steam from the steam-space of the boiler or other source of supply and designed to impel a continu- Such steam in passing into the tube induces a current of air to pass into the tube and, mingling with it, to travel along. passage 0 until it reaches the opening m at the far end and then flow through such opening into passage d, from which both air and steam then escape through the holes f into the furnace. In operation, therefore, my improved apparatus compels the air to travel to the rear end of the furnace before coming into contact with the fuel, and the pipe a being in close proximity to the fire it will at once be seen that the temperature of the air will be considerably raised by such traverse, and therefore rendered eminently fit to mingle with the unconsumed gases of the furnace. At the same time it will be seen that another advantage arises from the use of pipea in that in consequence of passing the air through the full length of the pipe it tends to keep the pipe 0001, which, owing to its close proximity to the burning fuel, is liable to burn out. This burning out of the pipe, however, is specially guarded against and prevented by a covering of fireclay or refractory (fireproof) material 0, made up, by preference, in sections with spigot and socket or like joints, as shown more clearly in Figs. 1, 7, 8, and 9. Eachsection is formed with openings 19, in exact register with holes fin tube a, and to retain such sections in their proper relative positions I provide the pipe at with a ridge q and the interior of each section with a groove 0'. (See Fig. 7.) They may, if necessary, be held by two or more ridges and grooves.

The posit-ion of holes f and p in relation to the furnace-grate is such as to direct the air and steam onto the burning fuel and for all practical purposes may lie at an angle of about forty-five degrees to the horizontal, as shown in Fig. 7. To permit, however, of the holes being arranged at varying angles to suit the fire or to direct the air and steam on the fuel at varying points, I provide the closed end of the tube with an extension 8 and support such extension in a metal bearing-piece t of, by preference,rectangular formation and designed to fit the fire-brick block, which in turn is built into the fire-bridge or other support. Upon the said extension of tube ct I form one or more ridges or flutes, (see Fig.9,) and in one end of bearing-piece i, which is formed with a circular opening 21, I form a series of corresponding flutes or ridges '0, (see Fig. 4,) with one or other of which the said ridges or flutes on the pipe extension is designed to take at a definite angle and so enable the holesfandp to lie in the desired position relatively to the furnace-grate. The adjustment of the front end of the tube a is permitted by set-screw 1.0; but the arrangement of flutes and ridges might be applied to both ends of the tube.

To eflectually secure the bearing-piece i, I form the rear end with an opening an and in the wall of such opening a hole y for the pas sage of a bolt which serves to secure the bearing-pieoe to the fire-brick block and bridge. The position of tube a or its extension in relation to bearing-piece t is such as to allow of contraction and expansion. It is also obvi ous that the tube may be supported from one end only or its closed end be supported from the crown of the furnace; also, that two or more pipes may be arranged in one furnace, with holes f and 19 set as desired.

Having thus particularly described my invention, I declare that what I claim is- 1. In combination, a tube with holes or perforations for delivering air or gaseous matter, a mid-plate Within the tube for producing two passages, flow and return, communicating with each other, and a plug for closing one end of the return-passage, as set forth.

2. In combination, a tube with holes or perforations for delivering air or gaseous matter, a mid-plate within the tube for producing flow and return passages communicating with each other, a plug for closing one end of the return-passage, a collar with T extension and adapted to fit over one end of the tube, a bracket with T-slot adjacent to said collar and adapted to receive the T extension of the collar, an extension on the tube, and a bearingpiece adjacent to such extension and adapted to receive the extension, as set forth.

3. In combination, a tube with holes or perforations for delivering air or gaseous matter, a mid-plate within the tube for producing flow and return passages com municatingwith each other, a plug for closing one end of the return-passage, a rib on said tube, a series of fireproof sections adapted to cover the tube and each of such sections having perforations or holes corresponding to those in the pipe, and a longitudinal recess on its interior face adapted to engage the rib upon the tube, as set forth.

4. A tube end bearing-piece consisting of a short tube of metal, a division-plate dividing such tube transversely, a hole in the wall of the rear part, and flutes in the Wall of the fore part, as set forth.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

WILLIAM GRIMSHAW STONES.

WVitnesses:

ARTHUR GRESTY, WALTER LUNN. 

